NOPR Collection:

Flow regime identification in air-water two phase flows based on acoustic impedance

Sun, 01 May 2016 00:00:00 GMT

Title: Flow regime identification in air-water two phase flows based on acoustic impedance Authors: Arunkumar, S; Adhavan, J; Arunaganesan, S; Venkatesan, M Abstract: Air-water two phase flows have been characterized using acoustic measurement and sound processing. Analysis is carried in a mini channel of diameter 1.8 mm. Sound of frequency 21500 Hz is emitted using a sound emitter held over the glass tube. A microphone is kept on the other side of the glass tube and acts as the acoustic electric transducer through which the sound signal is acquired using the microphone and is processed using an open source sound processing software AUDACITY 2.0. Filtering and amplification of sound signal is done using the software to study the two phase flow characteristics. Bubbly, Slug and Annular flow regimes are identified. The method can be used to characterize two phase flows without sophisticated instruments. Page(s): 240-243

Development and validation of UV-spectrophotometric method for the estimation of hydroxychloroquine sulphate

Sun, 01 May 2016 00:00:00 GMT

Title: Development and validation of UV-spectrophotometric method for the estimation of hydroxychloroquine sulphate Authors: Singh, Amit; Roopkishora; Sharma, Pradeep Kumar; Gupta, Ramji; Mondal, Nita; Kumar, Sokindra; Kumar, Mukesh Abstract: A simple, sensitive and accurate UV- spectrophotometric method has been developed for the determination of a hydroxychloroquine sulphate (HCQ) in raw material and pharmaceutical formulations. The parameters such as linearity, range, accuracy and stability have been determined according to International Conference on Harmonization (ICH) guidelines. UV - spectroscopic determination is carried out at an absorption maximum of 343 nm using 0.1N HCl as solvent. In the UV - spectroscopic method linearity over the concentration range of 1 – 20 µg/mL with a correlation coefficient of 0.9992. Results of the analysis are validated statistically and by recovery studies. The proposed method is simple, rapid, precise and accurate and can be used for the reliable quantitation of hydroxychloroquine sulphate in bulk and pharmaceutical formulations. Page(s): 237-239

Influence of operational parameters on photomineralization of Evans blue by Ag-TiO₂ composite

Sun, 01 May 2016 00:00:00 GMT

Title: Influence of operational parameters on photomineralization of Evans blue by Ag-TiO₂ composite Authors: Shintre, Surabhi; Thakur, Pragati Abstract: Study Ag-TiO₂ composite has been synthesized by photodeposition method. The prepared composite has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflectance spectroscopy (DRS). The effect of Ag deposition on TiO₂ has been tested for photocatalytic degradation of azo dye, Evans Blue (EB). The comparison of different advanced oxidation processes (AOP) such as (i) Only Ag-TiO₂(ii) only UV (iii) UV + TiO₂ (iv) UV + Ag-TiO₂ (v) UV + Ag-TiO₂ +H₂O₂ have been carried out for the photocatalytic degradation of EB. In addition, different operational parameters like initial concentration of EB and composite dose have also been studied on photocatalytic degradation of EB. The degradation is found to increase in the order only Ag-TiO₂ < Only UV < UV + TiO₂ < UV + Ag-TiO₂ < UV + Ag-TiO₂ + H₂O₂ for EB. Page(s): 232-236

Synthesis and characterization of solid electrolyte structure material (LiAlO₂) using different kinds of lithium and aluminum compounds for molten carbonate fuel cells

Sun, 01 May 2016 00:00:00 GMT

Title: Synthesis and characterization of solid electrolyte structure material (LiAlO₂) using different kinds of lithium and aluminum compounds for molten carbonate fuel cells Authors: Özkan, Göksel; Ergençoğlu, Vecihe İncirkuş; Özkan, Gülay Abstract: Synthesis and characterization of solid electrolyte structure material using different kinds of lithium and aluminum compounds for molten carbonate fuel cells have been carried out. Synthesis operations are performed using three different kinds of lithium compounds (LiOH.H₂O, LiNO₃ and Li₂CO₃) and two different kinds of aluminium compounds (Al₂O₃, Al(OH)₃). During the synthesis, all the reactions are conducted at four different pH levels (1.5, 4, 9.5 and 12) and are calcinated at three different temperatures in open air conditions. In the light of thermal, structural and surface area characterization (TG-DTA, XRD and BET analyses), it is concluded that LiAlO₂ which is produced with Li₂CO₃ and Al(OH)_3,is found to be convenient. Page(s): 227-231

NOPR Collection:

Flow regime identification in air-water two phase flows based on acoustic impedance

Development and validation of UV-spectrophotometric method for the estimation of hydroxychloroquine sulphate

Influence of operational parameters on photomineralization of Evans blue by Ag-TiO2 composite

Synthesis and characterization of solid electrolyte structure material (LiAlO2) using different kinds of lithium and aluminum compounds for molten carbonate fuel cells

Influence of operational parameters on photomineralization of Evans blue by Ag-TiO₂ composite

Synthesis and characterization of solid electrolyte structure material (LiAlO₂) using different kinds of lithium and aluminum compounds for molten carbonate fuel cells